As of today you can rent the Trikke Skki at Sport shop Loop in See. 

Sport shop Loop is situated at the top of the 6p gondel. So no need to take a Trikke Skki up, it's already set up at the start of the lifts. See is a very nice and small ski resort in the same valley as Kappl and Ischl - Silvretta Region. The slopes are prefect for Trikke Skki.

Link to the livecam

Link to sport-shop loop

Full map of all Trikke Skki rental and Trikke Skki friendly resorts.